23.8% is the change from 542 to 671
Calculation steps:
[( 671 - 542 ) ÷ 542] x 100 = 23.8%
Formula
Percentage change = [(671 - 542) / 542] x 100
Subtract the new number by the original number
671 - 542 = 129
129 ÷ 542 = 0.23800738007380073
0.23800738007380073 x 100 = 23.8%